Oxide TFTs for digital holography
May 21-25, 2017
Holographic display has been regarded as the ultimate goal of realistic display, for holographic display can express, in principle, all the depth cue, for example, motion parallax, accommodation, occlusion, and convergence. Analog hologram with photographic films show very realistic 3D images using white light. But electronic hologram with electronic SLM (spatial light modulator) show limited picture quality due to large pixel pitch. The required pixel pitch for holographic display with 30 degree viewing angle is about 1 micron meter. To accomplish ultra high resolution display, TFTs with no short channel effects at sub-micron channel length should be developed. Oxide TFTs can be a good candidate due to the absence of short channel effects, very simple device structure and versatile variation of process and channel structure. BCE structure has been known as the smallest TFT structure for oxide TFTs. High performance BCE oxide TFTs having sub-micron channel length have been developed for the backplane of 3um pitch SLM with 16K x 4K pixels for holographic display.
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Chi-Sun Hwang, "Oxide TFTs for digital holography" in "International Conference on Semiconductor Technology for Ultra-Large Scale Integrated Circuits and Thin Film Transistors VI (ULSIC vs TFT 6)", Yue Kuo (Texas A&M University, USA) Olivier Bonnaud (University of Rennes I, France) Eds, ECI Symposium Series, (2017). http://dc.engconfintl.org/ulsic_tft_6/30